/**
 * Minimal WebVTT parser.
 *
 * Handles:
 * - UTF-8 BOM
 * - Timestamp lines `HH:MM:SS.mmm --> HH:MM:SS.mmm`
 * - Cue IDs (optional identifier line before timestamp)
 * - NOTE blocks (skipped)
 * - STYLE blocks (skipped)
 * - REGION blocks (skipped)
 * - Preserves <b>, <i>, <u> formatting tags; strips all others
 */
export interface VttCue {
    id: string;
    startTime: number;
    endTime: number;
    text: string;
}
/**
 * Parse a WebVTT timestamp string into seconds.
 *
 * Formats:
 *   HH:MM:SS.mmm
 *   MM:SS.mmm
 */
export declare function parseTimestamp(ts: string): number;
/**
 * Parse a WebVTT string into an array of cues.
 */
export declare function parseWebVTT(input: string): VttCue[];
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